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Biomedical subjects

A M Fried

Publications and source records attributed to A M Fried.

At least 37 records · Page 2Linked to original sources
PubMed1983

Hydronephrosis of pregnancy: a prospective sequential study of the course of dilatation.

The kidneys of 20 asymptomatic pregnant women were examined sequentially from the first trimester through the postpartum period. In 41.5 per cent, progressive dilatation, more marked on the right side, was seen; however, the remainder demonstrated varying, static, or even diminishing ectasia. In all but two dilatation had reverted to normal by six weeks post partum. The finding of minimal dilatation speaks against pathologic obstruction even in the symptomatic patient. Asymptomatic patients can, however, show variable degrees of hydronephrosis with progression or regression through the course of gestation. The finding of dilatation must be interpreted with caution by virtue of these sequential variations.

Dilatation, Pathologic↗
PubMed1982

Ultrasonic characterization of acute renal failure.

The attenuation coefficient, propagation velocity and backscattering coefficient were measured in vitro, on freshly excised and functionally impaired rabbit kidneys. subcutaneous glycerol treatment was used to introduce acute renal failure. Elevated plasma creatinine levels, measured prior to the excision of kidneys, were used as an index of the degree of renal functional impairment. Propagation velocity for the ten kidneys ranged between 1538-1575 m/s with that for the normals being 1540 +/- 4 m/s. Velocity was found to increase with increasing renal damage. The attenuation coefficient for all ten kidneys exhibited a linear frequency dependence over the range 3.5-6.5 MHz. The slope of the attenuation coefficient for the glycerol treated kidneys (0.723 dB/cm/MHz) was found to be higher than the slope for the normals (0.499 dB/cm/MHz). The frequency dependence of the backscattering coefficient was not altered by glycerol treatment leading to the postulate that modification of frequency dependent behavior of the attenuation coefficient in this experimental model is primarily due to absorption.

Acute Kidney Injury↗
PubMed1982

Limited usefulness of aortic arch angiography in the evaluation of carotid occlusive disease.

The role of aortic arch angiography in the evaluation of cerebral ischemic disease is not well defined. In an attempt to develop guidelines for its optimal use, a prospective study of 100 patients with carotid distribution ischemic events was undertaken. Each patient underwent bilateral selective carotid angiography followed by arch aortography. In only two of the cases did the arch examination affect patient management. In the other individuals, the arch study either added no clinically useful information (69), or demonstrated abnormalities that did not affect patient care (29). The findings of this study support the use of arch aortography only in those patients who have surgical lesions demonstrated by the selective carotid examinations.

Adolescent↗
PubMed1982

Fractures of first and second ribs: predictive value for arterial and bronchial injury.

Fractures of the first and second ribs had a very low association with ruptured bronchus (2%) and ruptured aorta or brachiocephalic vessel (8%) in a series of 50 patients. Radiographic abnormalities indicative of ruptured bronchus include massive pneumothorax, pneumomediastinum, subcutaneous emphysema, and lobar or whole lung collapse which may fall to the dependent part of the thorax on erect views. Abnormalities pointing to a laceration of the aorta or one of the brachiocephalic vessels include widening of the superior mediastinum, shift of the trachea or nasogastric tube to the right, enlargement or indistinctness of the aortic knob, and widening of the right paraspinal line. One or more of these abnormalities indicates the need for thoracic aortography. In the absence of these abnormalities, aortography is not indicated solely by the presence of a first or second rib fracture on the chest radiograph.

Aorta, Thoracic↗
PubMed1981

The effectiveness of the incidental small-bowel series.

The authors reviewed 210 consecutive small-bowel series and found that the rate of positive yield was high when indications suggesting small-bowel disease were applied; however, it was quite low in those studies that appeared to have been requested merely as an addendum to the upper gastrointestinal series. Indications producing a high positive rate are described.

Cost-Benefit Analysis↗
PubMed1981

Bulging amnion in premature labor: spectrum of sonographic findings.

Premature labor or vaginal bleeding in the second and third trimesters may be associated with a spectrum of sonographically definable abnormalities of the endocervical canal. Of 13 patients encountered, eight demonstrated dilatation of the entire canal, which contained fluid, placenta, and small parts in various combinations; all delivered prematurely. The other five, in whom dilatation was limited to the proximal canal, carried to term. Seven fetuses were breech and six transverse; none were cephalic. Abnormalities of the cervical canal were seen in 6.9% of patients examined over a 1 year period for bleeding in the second and third trimesters.

Adolescent↗
PubMed1981

Therapeutic embolization of diffuse pulmonary arteriovenous malformations.

Pulmonary artery fistulas may occur as isolated lesions or as part of the complex of hereditary hemorrhagic telangiectasia. Surgical resection is generally advised because of the potential for severe complications; however, this may be difficult in diffuse telangiectasia or contraindicated in patients with severe obstructive lung disease. This article offers therapeutic embolization as an effective alternative in such patients, and presents a successful experience.

Arteriovenous Fistula↗
PubMed1980

High retroperitoneal lymphocele: unusual clinical presentation and diagnosis by ultrasonography.

A case of a mid lumbar lymphocele secondary to retroperitoneal lymphadenectomy for testicular carcinoma is described. The clinical picture was unusual and confusing in that the symptoms were gastrointestinal in nature. Ultrasound provided the diagnosis and guidance for aspiration. Although the most common operative source of lymphocele formation appears to be the pelvic lymphatics similar collections may arise from para-aortic and renal hilar dissections and produce unusual manifestations. Ultrasound is of established value in such cases.

Adult↗
PubMed1980

Ventriculoperitoneal shunt function: evaluation by sonography.

The function of ventriculoperitoneal shunts was evaluated by ultrasonography in 17 patients. In 10 of 15 patients with properly functioning shunts, a small amount of free intraperitoneal fluid was found. However, absence of demonstrable fluid did not reliably indicate shunt malfunction. No asymptomatic patients had large amounts of ascites or loculated fluid collections, both of which were considered pathologic in shunt patients.

Cerebrospinal Fluid Shunts↗
PubMed1980

Solitary cavities of the lung: diagnostic implications of cavity wall thickness.

Sixty-five solitary cavities of the lung were evaluated for wall thickness. All lesions in which the thickest part of the cavity wall was 1 mm were benign. Of the lesions whose thickest measurement was 4 mm or less, 92% were benign. Of cavities that were 5-15 mm in their thickest part, 51% were benign and 49% malignant. Of those over 15 mm thick, 95% were malignant. Measurement of the thickest part of te cavity wall gives a more reliable indication of benignancy or malignancy than measurement of the thinnest part.

Anthropometry↗